Kari ga ne no samuki asake no tsuyu narashi kasuga no yama o momitasu mono wa

雁が音の寒き朝明の露ならし
春日の山をもみたすものは

Roma-ji: Kari ga ne no samuki asake no tsuyu narashi kasuga no yama o momitasu mono wa
English Translation: When the wild geese cry
on the cold dawn, it's the dew
it must be, I think,
that makes Kasuga's mountain
turn to crimson autumn leaves.
Meaning: It must be the dew of the cold dawn, when the wild geese cry, that turns the mountain of Kasuga to autumn colors.
Commentary: Book Ten Autumn Miscellaneous Poems 2181

Headnote continued from the preceding poem: "On Autumn Leaves"
This poem infers that what colors Mount Kasuga must be the dew of the cold dawn when the geese cry. Against the background of the belief that dew causes autumn color, the geese's voices and the chill of the dew shape the season of autumn leaves. Whereas the preceding poem attributed the color to showers, this one attributes it to dew, so what dyes the leaves is sung in various ways within the group.

The first line, "of the geese's cry," names the sound.
In the second line, "samuki asake no," "asake" means dawn: the cold dawn of the geese's cry.
In the third line, "tsuyu narashi," "rashi" marks grounded inference: it must be dew. The poem breaks here.
The fourth line, "Mount Kasuga," sings of the same mountain as the preceding poem.
In the last line, "momitasu mono wa," "momitasu" means to color with autumn hues; by inversion it names the object of inference at the end.
Source: Manyoshu
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